1. A case of severe fever with thrombocytopenia syndrome with Campylobacter jejuni bacteremia
SHAO Shu-li ; ZHANG Yu ; MA Shu-qing
China Tropical Medicine 2023;23(4):439-
Abstract: Objective This article aims to present a rare case of severe fever with thrombocytopenia syndrome (SFTS) complicated by with bacteraemia caused by Campylobacter jejuni, and to discuss the pathogenic characteristics, culture methods, clinical features and treatment points of Campylobacter jejuni and the patient's outcome, with a view to raising clinical awareness of blood culture and providing experience for the treatment of this disease. Methods The clinical data of a case with SFTS complicated by bacteremia caused by Campylobacter jejuni admitted to Weihai Municipal Hospital were collected and the diagnostic process of the pathogenic bacteria as well as the treatment plan were retrospectively analysed. Results The patient was a female who had been bitten by a tick bite half a month ago and presented to the hospital on 30th August with a fever, vague pain in the peribulbar abdomen and diarrhea for 5 days. Laboratory tests showed leukopenia and thrombocytopenia, and nucleic acid detection for SFTS was positive, resulting in a diagnosis of SFTS. After a week of antiviral treatment with ribavirin and symptomatic treatment, the patient suddenly experienced high fever at night, with a temperature reaching 39.5 °C. Blood cultures were immediately taken from both sides of the double bottle. Bilateral anaerobic bottles were tested for positive after 53.06 hours, and Gram-negative Campylobacter was cultured anaerobically in a transfer blood plate and further identified as Campylobacter jejuni using mass spectrometry MALDI-TOF MS. Vancomycin was stopped clinically on the basis of bacterial pathogenesis and meropenem was used for anti-infection and symptomatic treatment. During the treatment, blood culture and nucleic acid detection for SFTS turned negative, and the patient's symptoms improved. After normal results were achieved in the follow-up testing, the patient was discharged. Conclusions This case serves as a reminder that Campylobacter jejuni not only causes intestinal infections, but can also lead to extra-intestinal infections in immunocompromised individuals. Clinical and laboratory personnel should increase their recognition of Campylobacter jejuni, prioritize blood culture methods, and utilize a multidisciplinary approach in diagnosis and treatment.
2.Study on Gambogic Acid-loaded Polylacticacid Nanoparticles
Shu-Zhen LI ; Wu-Qing OUYANG ;
China Biotechnology 2006;0(02):-
Gambogic acid-loaded polylacticacid nanoparticles (GA-PLA-NPs) were prepared by modified emulsification solvent diffusion. The shape of nanoparticles was observed by transmission electron microscope (TEM).The size distribution and mean diameter were measured by laser particle size analyzer. The entrapment efficiency and content of drug loading were determined by Ultraviolet Spectrophotometer after ultracentrifugation. GA-PLA-NPs release behavior in vitro was carried out. The acute toxicity were carried out to study the security of GA-PLA-NPs. The preparation process adapted to the formulation was as follows: the volume ratio of the aqueous and organic was 2∶1(v/v), the surfactant concentration in aqueous was 0.5%,the drug concentration in organic was 0.1%(w/v), GA∶PLA was 1∶4(w/w). The mean diameter was 51.36nm for the nanoparticles prepared by above conditions.The entrapment efficiency and content of drug loading were 98.87 % and 13.3 %. The release behavior of drug in vitro showed an initial burst effect with subsequently a slower rate stage. The LD50 value of GA-PLA-NPs on mouse was 26.3 mg/kg. The results showed that the GA-PLA-NPs were well prepared with stable quality and high dispersion. PLA-NPs might be used as a new carrier for gambogic acid.
3.Detection of anti-dsDNA antibody in SLE patients by enzyme marking staphylococcal protein A (SPA)
Chinese Journal of Immunology 1985;0(01):-
The results of the detection of fhe antibody against dsDNA in 244 sera by immunohisto—chemical method of enzyme marking SPA were reported and compared with immunoflurescence assay and enzyme marking antibody method. Positive rate in 31 cases with SLE was 71%. Of the 31 cases 21 with SLE in theactive phase were all positive,1 out of 10 cases at the recovery stage was positive,2 outof 152 cases with other connective tissue and non connective tissue disease were weaklypositive,61 normal persons were all negative.The overall agreement was the same asthe immunofluorescence and enzyme marking antibody method.Enzyme marking SPAmethod offers a number of significant advantageous.This method was easily operated,did not need to prepare second antibody,and special equipment was not needed.It can beused clinically.
4.Detection and purification of cultured rat retinal Müller cell by flow cytometer
Min, GONG ; Bo-lin, XIE ; Shu-qing, LI ; Fan, LI
Chinese Journal of Experimental Ophthalmology 2011;29(2):121-124
Background Establising the culture model of Müller cells for obtaining the highly putified target cells is essential for the study about the physiology and pathology of retinal Müller cells. The exsiting purifing method for culturing Müller cells is dissatisfactory. Objective This study was to establish a method to obtain high purifing Müller cells. Methods The retina from 5 clean newborn SD rats were isolated and digested by 0. 01% trypsin and cultured in DMEM containing 10% fetal bovine serum. The cellular suspension was then prepared,and the target cells were screened using flow cytometry based on the size and the quantity of cells. Cultured and passaged cells were identified by transmission electron microscope and light microscope. Immunocytochemistry was used to detecte the expression of GFAP in cultured cells for the determination of type and purity of the cells. Results The cells showed the similar shape to retinal Müller cells after primarily culture with the large volume, and some small other types of cells could been seen. The growth of cells was quickly 3 weeks later. The fibroblasts were removed using sticking-wall by steps,and neurons were eliminated following passage. Aboundent of cellular organs were seen under the transmission electron microscope. The positive response rate of the cells for CFAP was 100%. Conclution Flow cytometry offer a rapid and feasible approach for purifying Muller cell and it builds the foundation for further study about Müller cells.
7.Glucocorticoid or androgen for autoimmune premature ovary failure in mice
Xiaobo SHI ; Na LI ; Can LIAO ; Qing SHU ; Fufan ZHU
Journal of Central South University(Medical Sciences) 2009;34(7):576-581
Objective Using mouse autoimmune premature ovary failure (POF) model to seek theoretical evidence for a possible clinical therapy of autoimmune POF with glucocorticoid (GC) or an-drogen. Methods After autoimmune POF was induced in 60 mice by Pzp3, the mice were randomly as-signed into 3 groups (n=20) : Two groups were treated with GC or androgen and the control group was treated with distilled water. We observed the changes in the sexual cycles of the mice, the serum level of AzpAb, infiltration of cells positively expressing CD45 in the ovary, and pathological alterations of the ovary. Results The sexual cycle of each therapy group was significantly different from that of the control group. The mean serum level of AzpAb of each therapy group was significantly lower than that of the con-trol group, and the mean serum level of AzpAb in the GC group was significantly higher than that of the androgen group. The percentage of growing follicles in the ovary of each therapy group was significantly higher than that of the control group. Ovaries infiltrated by cells positively expressing CD45 of each thera-py group were significantly fewer than those of the control group. Conclusion GC or androgen in mice with autoimmune POF could obviously ameliorate the pathogenetic conditions of the disorder, and both treatments have similar therapeutic efficacy.
8.Differences between the expression of matrix metalloproteinase-2.9 in preeclampsia and normal placental tissues
Jin-Ke LI ; Qing XIONG ; Shu ZHOU ; Pei-Feng YANG ;
Chinese Journal of Obstetrics and Gynecology 2001;0(02):-
Objective To study the possible relationships between expression of matrix metalloproteinase(MMP)2,9 and the pathogenesis of preeclampsia in which trophoblast invasion is impaired. Methods MMP-2,9 expression were detected by immunohistochemistry streptavidin-biotin complex (SABC)method in 20 normal term placentae and 20 preeclampsia placentae,respectively.In addition, mRNAs for MMP-2,9 were analyzed by real time PCR in both groups.Results The intensities of both MMP-2 and MMP-9 immunostaining in preeclampsia placentae were significantly declined compared to those of normal term placentae(P
9.18F-FDG PET/CT associated with MRI in epilepsy surgery
Xu, CHEN ; Kai, SHU ; Ting, LEI ; Qing, JIA ; Ling, LI
Chinese Journal of Nuclear Medicine 2010;30(6):372-374
Objective To evaluate retrospectively the role of 18 F-fluorodeoxyglucose (FDG) PET/CT associated with MRI in the localization of epileptogenic foci. Methods Sixty-seven patients with medically resistant epilepsy were included from 2003 to 2008. All underwent 18F-FDG PET/CT and MRI for presurgical evaluation as well as post-surgical evaluation 12 to 65 months after operation. Based on postoperative seizure occurrence, patients were divided into two groups. One group was free of seizures ( Engel classification Ⅰ, Group 1) and the other was with postoperative seizure occurrence of any type ( Engel classification Ⅱ-Ⅳ, Group 2). X2-test or Fisher's exact test was used for the statistical analysis. Results About 71.6% (48/67) patients were defined as group 1, and 19 patients were group 2 ( 11 were Engel Ⅱ , 5 were Engel Ⅲ, and 3 were Engel Ⅳ ). In Group 1, no statistically significant difference was found between concordant (45/63) and discordant findings (3/4) with regard to 18F-FDG PET/CT and MRI images (Fisher's exact test, P >0.05). For 41 patients that showed focal abnormality both on MRI and 18F-FDG PET/CT, 80.5% (33/41) were found in group 1. For 20 patients that showed focal lesions on MRI while with multi-focal or generalized abnormal metabolism on 18F-FDG PET/CT, 11 (55.0%) were in group 1 and9 (45.0%) were group 2. There was no significant difference (33/41 vs 11/20, X2 =4.34, P <0.05 ). Conclusion 18F-FDG PET/CT associated with MRI may offer more helpful information for pre-surgical evaluation and prediction of prognosis of epileptic patients.